On the morning of 30 October 2000, ETA terrorists planted a car bomb with 20 kilograms of dynamite at Number 60, Avenida de Badajoz, in the La Concepción district of Madrid. The terrorists detonated the device when an official vehicle was passing, containing Supreme Court magistrate José Francisco Querol y Lombardero, his chauffeur, Armando Medina Sánchez, and his bodyguard, Jesús Escudero García. The powerful explosion killed all three. Jesús Sánchez Martínez, a municipal bus driver, was severely injured and died on 8 November. Another 64 people were wounded. More than 700 homes in 35 buildings were damaged by the explosion.
José Francisco de Querol Lombardero, aged 69 years and originally from Tarragona, was married with four children. After a long career in the military and judiciary, the magistrate was due to retire in just over a week.